DLP 방식의 3D 프린터로 제작된 임시 보철물의 변연 및 내면 정확도 평가
Evaluation of marginal and internal accuracy of provisional crowns manufactured using digital light processing three-dimensional printer
노미준, 이하빈, 김지환,
소속 상세정보
노미준 ( Noh Mi-Jun ) - Korea University Graduate School Department of Dental Laboratory Science and Engineeing
이하빈 ( Lee Ha-Bin ) - Korea University Graduate School Department of Dental Laboratory Science and Engineeing
김지환 ( Kim Ji-Hwan ) - Korea University Graduate School Department of Dental Laboratory Science and Engineeing
Abstract
Purpose: The aim of this study was to evaluate the accuracy of provisional crowns manu-factured using a milling machine and a digital light processing (DLP) printer.
Methods: A full-contour crown was designed using computer-aided design software. Provi-sional crowns of this design were manufactured using a milling machine and using a DLP three-dimensional (3D) printer (N=20). The provisional crowns were digitized with an extra-oral scanner, and 3D deviation analysis was applied to the scanned data to confirm their accuracy. An independent t-test was performed to detect the significant differences, and the Kolmogorov-Smirnov test was used for analysis (α=0.05).
Results: No significant differences were found among the precision of marginal surface be-tween the printed and milled crowns (p=0.181). The trueness of marginal and internal sur-faces of the milled crowns were statistically higher than those of the printed crowns (p=0.024, p=0.001; respectively).
Conclusion: The accuracy of provisional crowns manufactured using a milling machine and a 3D printer differed significantly except with regards to the precision of the internal sur-face. However, all the crowns were clinically acceptable, regardless of the manufacturing method used.
키워드
Accuracy; Computer-aided design; Computer-aided manufacturing; Digital light processing; Provisional crown; Three-dimensional printer
원문 및 링크아웃 정보
등재저널 정보